नैवाद्या निशि नैवोष्णं वसन्त उष्ण शरत्सु न|
Sour curd shouldn’t be consumed by making it hot (ushna).
Curds shouldn’t be consumed during night (nishi),
It ought to also not be consumed during Vasanta and Sharad seasons.
Sour curds mixed with soup of mung, honey, ghee, sugar and amalaki is useful in relieving difficulty in urination and dyspepsia.

Answer:
Avoid consuming curd at nighttime. As night is Kapha predominant period. So consuming curd at nighttime is best avoided. Curd also increases pitta. Hence, taking it at nighttime may cause dyspepsia problem.
If you’re accustomed to take curd at nighttime, mix little pinch of pepper powder to curds and consume. you’ll also try adding fenugreek powder if you can tolerate a small tinge of bitterness. (But this very good combination will relieve all kinds of stomach pain generated as a result of indigestion).